Question

我最近将我的应用程序从之前版本的swift转换为swift 3.0（并且还获得了最新版本的Xcode），并且在其他许多错误中，我收到了以下版本：

func application(_ application: UIApplication, didRegisterForRemoteNotificationsWithDeviceToken deviceToken: Data) {
        let installation = PFInstallation.current()
        installation.setDeviceTokenFrom(deviceToken)
        installation.saveInBackground()

        PFPush.subscribeToChannel(inBackground: "") { (succeeded: Bool, error: NSError?) in
            if succeeded {
                print("ParseStarterProject successfully subscribed to push notifications on the broadcast channel.\n");
            } else {
                print("ParseStarterProject failed to subscribe to push notifications on the broadcast channel with error = %@.\n", error)
            }
        }
    }

这来自我作为模板下载的SDK（PF指的是Parse框架......我使用的是Heroku托管的Parse服务器）。返回错误说：＆＃34;无法转换类型的值＆＃39;（Bool，NSError？） - ＆gt; （）＆＃39;预期参数类型＆＃39; PFBooleanResultBlock？＆＃39;＆＃34;

不确定如何解决这个问题。有没有人有任何想法？

Answer 1

我相信您可以像这样更改您的代码：

    PFPush.subscribeToChannel(inBackground: "", block: {(succeeded, error) -> Void in
        if succeeded {
            print("ParseStarterProject successfully subscribed to push notifications on the broadcast channel.\n");
        } else {
            print("ParseStarterProject failed to subscribe to push notifications on the broadcast channel with error = %@.\n", error)
        }
    }

Answer 2

使用 Swift 3 ，您可以写下：

  PFPush.subscribeToChannel(inBackground: "") { (succeeded, error) in
        if succeeded {
            print("ParseStarterProject successfully subscribed to push notifications on the broadcast channel.\n")
        } else {
            print("ParseStarterProject failed to subscribe to push notifications on the broadcast channel with error = %@.\n", error)
        }
    }

转换为swift 3后，AppDelegate.swift函数返回错误（无法转换为PFBooleanResultBlock？）？

2 个答案: